Anyone running 3 15M AC's on 50 amp? Follow up added

True 50 amp service is actually 100 amps total. Three AC units should be able to run, along with other appliances IF all three AC units are NOT wired to one leg of the 50 amp input. If all three are wired to one leg on the incoming service, than 50 amp is the limit on the AC units, but that should not affect the other appliances on the other 50 amp leg of service.
Of course if all of the AC units are wired on one leg and that leg trips on the park pedestal, it will shut off both legs since the breaker is tied together.

One of the units needs to be on the other leg. There are 6000 watts available on each leg. In theory four units could be run, two on each leg.

No problem if proper 50 amp RV service (two 50 amp hots) AND properly wired coach (one each A/C on each hot leg).

Your signature indicates you are operating a Newmar Dutch Star... Newmar coaches will run 3 ACs and oodles of other "stuff" without breaking a sweat!! You were told WRONG my friend!! Not to speak heresy, but I would suggest you also join the IRV2 Forums and link to the Newmar owners section! The information available there is unbelievable!!

Thanks everyone. We have been in a CG with no trees and 95+ temps and humidity for several days. Two units does well until about 3:00 or so and then the cabin looses a little ground. We'll go ahead and turn on the third unit today.

rgatijnet1 wrote:
...50 amp service is actually 100 amps total...

Yes...two legs with 50 amps each. It will run three ACs easily.

Would not hurt to measure AC draw.
My 15k Carrier draw 8.2 amp while running, so theoretically I could run 3 of them on 30 amp service, but the motors have huge spike while restarting and that is why they require bigger power line.
Common sense if you want to use 3 of them is to set thermostats on 2 to low and let the 3rd one cycle when it gets too cold.
That will avoid the potential situation when 2 might want to restart in the same time.

We run 4 AC units all the time. Popped the breaker once when the DW also had the stove, crock pot and electric floor steamer on at same time.

Run three all the time including right now on the generator.

You can run all three on the 50 amp service. As explained above, there are 50 amps on each leg, or about 6 KW per leg, 12 KW total.

The start up amperage is around 30 amps for a couple of seconds, and the 50 amp breaker can handle a 200 amp load for 2 seconds without tripping.

Each unit should not be drawing more than around 12 amps, and if one is on one leg, the other two can be on the other leg, so max 25 amps on one side, 13 on the other. Your battery charger, refrigerator, and other appliances will work fine on the 50 amp service.

However if you are in a park with 30 amp max, then you will be restricted to only 2 of the A/C units if EVERYTHING else is off. If you have a residential refrigerator, then you could run one A/C and the refrigerator can cycle on and off, along with other loads. The residential refrigerator is probably about 3-5 amps load.

Good luck,

Fred.